[Aachen]

There's more than one store, and more than one payment method. If all else fails, it's easy to borrow/share, and succesful purchases can last a little while. There's redundancies and async operations throughout

If you need to receive a call to a particular number, it having a(n indefinite) disruption can mean you're going to have a bad day. Tech products aren't as mature as e.g. money and food